Hone



Oct. 9, 1934- HERMANN 1,976,070

HONE

Filed Aug. 29,. 1932 v I 122197150); xii/76556.9. (3 jazz? 156 77717171,

56 W J M 3 Patented Oct. 9, 1934 UNITED STAT s PATEN OFFICE 7 Claims.

10" end the invention consists in producing an artificial stone of abalanced mixture of finely powdered abrasive, polishing and lubricatingingredients characteristically prepared and incor- I porated with asuitable liquid cement as a binder and mass hardening agent, ashereinafter more specifically'described and afterwards pointed out withparticularity in the appended claims.

In'the accompanying drawing forming part of this specification,-

Fig. 1 is a perspective view of one form of hone made in accordance withthe invention;

Fig. 2 is a similar view of a modified form of hone; and j Fig. 3 is asimilar view of a further modification.

Referring now more particularly to Fig. 1 of the drawing, the honecomprises an artificial block or slab 5 molded from a mixture of whitepowdered zinc in the proportion of one-fourth of the bulk, and anotherfourth part of the bulk comprising an ingredient prepared by burning amixture of equal parts in bulk of powdered pumice stone and sawdust, theother one-half A of the mixture comprising the residue from the burningof a mixture in equal parts in bulk of the finest grade of white sandand sawdust. The white zinc powder is of the ordinary preparedcommercial kind of the finest and softest texture, and the powderedpumice stone used in the no mixture with the sawdust is of the ordinarycommercial kind of the finest reduction. The resultant residue from theburning of the pumice stone powder and sawdust is a relatively soft atextured polishing element, so that mixed with the residue of the burntmixture of the sand and sawdust, which is an eflicient though finelypowdered abrasive, and the zinc serving as an effective lubricator inthe mixture, to which is added a sufficient quantity of a suitableliquid '50 cement as a binder and hardening agent for the mass, a stoneis produced which is ideal for the honing of razor blades of the averagedegree of hardness, the color of the stone molded from this particularmixture being a medium gray.

While a hone comprising the ingredients above noted and in theproportions stated, is ideal for the honing of the average razor blade,in the hands of an operator ordinarily skilled, and by the use of whichthe liability of overhoning is avoided, there are some cases where theblade to 03 be sharpened is harder than the average and, obviously, arelatively harder stone is required in the honing process, particularlyin initially sharpening the blade, and to this end the slab may bemolded entirely of the one ingredient C5 which is the resultant productof burning the half and half bulk mixture of white sand and sawdust witha suficient quantity of the liquid cement as a binder and hardeningagent. The stone composed from this last named ingredient '20 is of adark gray color and, preferably, it is molded in direct engagement witha stone of the mixed ingredients first herein described, or otherwiseat-' tached thereto so that the two characters of stones are included inone unitary structure 2 whereby a razor blade may be conditioned oneither one side or the other of the block, or initially treated on theone side and finished on the other. As shown in Fig. 2 one-half of theblock or slab designated by the numeralG, comprises the same material asthe slab 5 in Fig. 1, While the other half '7 of the modified block orslab, comprises the sole ingredient just above noted.

In other cases there are blades of relatively softer steel than theaverage and, of course, a correspondingly soft textured honing stone isrequired for sharpening and setting the blade. To this end a stone maybe molded from the same ingredients first herein described but indifferent proportions in the mixture. For example, an ideal stone forthe purpose may be molded from a mixture of one-third bulk part of thezinc powder, one-third bulk part of the product resulting from theburning of the mixed pumice stone and sawdust, and the other one-thirdpart being the product of burning the mixture of sand and sawdust. Itwill thus be seen that the proportion of relatively hard abrasive powderis reduced in the mixture, while the percentage of polishing slab ofthis last noted modification, is composed of the relatively softer andlighter colored mixture last described.

While the particular ingredients and in the proportions hereinspecifically described, are ideal for the purposes intended, theinvention is not necessarily limited to the same, as there may beequivalents substituted for the particular materials noted and changesin the proportions of the mixture with the scope of the appended claims.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent is: I

1. An artificial honing stone for razor blades and the like, comprisinga mixture of a finely powdered abrasive substance resulting from heatingfine sand and sawdust, a finely powdered polishing element and a finelypowdered lubricant with a cementitious binder and hardener.

2. An artificial honing stone for razor blades and the like, comprisinga mixture of a powdered product resulting from the burning of fine sandand sawdust, a product resulting from the burning of powdered pumicestone and sawdust, and powdered zinc with a cementitious binder andhardener.

3. An artificial honing stone for razor blades and the like, comprisinga mixture of one-half bulk part of a product resulting from the burningof fine sand and sawdust, a one-fourth part of a product resulting fromthe burning of pumice stone and saw dust, and a one-fourth part ofpowdered zinc, with a cementitious binder and hardener.

4. An artificial honing stone for razor blades and the like, comprisingone-half bulk part of a product resulting from the burning of equalparts of fine white sand and sawdust, a one-fourth bulk part of aproduct resulting from the burning of equal parts of powdered pumicestone and sawdust, and one-fourth bulk part of powdered zinc with acementitious binder and hardener.

5. A hone for razor blades and the like comprising a block or slab,one-half of which is composed of a mixture of one-half bulk part of afinely powdered abrasive material resulting from heating fine sand andsawdust, one-half bulk part of finely powdered polishing material, andonefourth bulk part of a finely powdered lubricant, with a cementitiousbinder and hardener, the other half of said block or slab comprising thesole ingredients of finely powdered abrasive material with acementitious binder and hardener.

6. A hone for razor blades and the like comprising a block or slab,one-half of which is composed of a mixture of one-half bulk part of afinely powdered abrasive material resulting from heating fine sand andsawdust, one-fourth bulk part of a powdered polishing material, andone-fourth bulk part of a powdered lubricant, with a cementitious binderand hardener, the other half of said block or slab comprising a mixtureof one-third bulk part of the finely powdered abrasive material,one-third bulk part of the powdered polishing material, and one-thirdbulk of the powdered lubricant, with a cementitious binder and hardener.

'7. An artificial honing stone for razor blades and the like, comprisingone-third bulk part of powdered zinc, one-third bulk part of the productresulting from the burning of equal parts of mixed pumice stone andsawdust, and one-third bulk part of the product resulting from theburning of equal parts of white sand and sawdust.

LOUIS HERMANN.

